Property and Equipment, Net - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Property Plant And Equipment [Line Items]
Total property and equipment	$ 904	$ 369
Less: accumulated depreciation	(92)	(19)
Property and equipment, net	812	350
Equipment
Property Plant And Equipment [Line Items]
Total property and equipment	368	339
Construction-in-Progress
Property Plant And Equipment [Line Items]
Total property and equipment	$ 536	$ 30